Johnny Depp and Amber Heard in marriage split after just 15 months

Actor Johnny Depp and his wife Amber Heard are divorcing after 15 months of marriage.

Heard, 30, cited irreconcilable differences and is seeking spousal support from the Pirates Of The Caribbean star, according to court records.

The pair, who do not have children together, married in February last year after co-starring in the 2011 film The Rum Diary.

Depp, 52, has asked a judge to reject Heard's claim for spousal support in a response filed through his lawyer, celebrity news website TMZ reported.

The couple were recently forced to apologise after Heard illegally smuggled Depp's pet dogs, Boo and Pistol, into Australia.

Heard pleaded guilty last month to falsifying documents to conceal the pets when she arrived by private jet to join her husband on the set of the fifth film in the Pirates Of The Caribbean series.

They recorded a 40-second videotaped apology as part of a deal with prosecutors that allowed Heard to avoid a conviction. The video was widely ridiculed for Depp's wooden delivery.

Heard filed for divorce on Monday, three days after Depp's mother Betty Sue Palmer died aged 81 following a long illness. The American actress listed the couple's separation date as Sunday.

Depp was previously married to make-up artist Lori Anne Allison before their divorce in 1985. The Oscar-nominated actor has a daughter, model Lily-Rose Depp, and son, Jack, with former partner Vanessa Paradis.

Depp attended the Los Angeles premiere of his new film Alice Through The Looking Glass alone on Monday.

He has been locked in a bizarre war of words with Australian deputy prime minister Barnaby Joyce since the politician threatened to have Depp's pet dogs put down after they were brought into the country illegally.

Depp ridiculed Mr Joyce on US television this week, telling talk show host Jimmy Kimmel: "He looks somehow inbred with a tomato."

Mr Joyce responded by claiming he was "pulling little strings" inside the Hollywood star's head like fictional serial killer Hannibal Lecter.

He also thanked Depp for the publicity he gave Australia's tough biosecurity laws through the case that was widely lampooned as a "war on terrier".